Fluid-proportioning apparatus.



Bl'. n. B'. WRIGHT. FLUID PROPORTIONiNG-APPARATUS.

APPLICATION FILED MAR. Il. i918.

Patented Mar. 4,1919.

GNDZD. B. WRIGHT, 0F PHILADELPHIA, PENNSYLVANIA, ASSIG-NOR T0 "il SAFETY IBO WORKS, 0F PHILDEEPHIA, PENNSYLVANIA, A FIRM COMPSED 0F JOSEPH S. LOVERING WHARTON, WILLIAM S. HALLOWELL, ANB JOHN C. JONES.

rturn-rnoronfrrenme APPARATUS.

Specivcation of Letters Patent.

Vappunti@ mee maren 11, 191s. serial ne. esigere.

To aZZwwm t may concern:

Be it known that l, RAYMOND D. B. WRIGHT, a citizen of theUnited States, residing in the city and 'county of lhiladelphia, State of Pennsylvania, have invented certain new and useful Improvements in Fluid-Proportioning' Apparatus, of which the following is a specication.

My invention .relates to a system of or apparatus for automatically proportioning the quantity or' rate of iiow of one Huid wlth respect to the quantity or rate of flow of an other fluid, as for example, forp'roportioning a chemical-containing liquid with respect tothe quantity or rateot` iow of an? other liquid having content with which the chemical is to react; andmore particularly, my invention relates .toa' system or'apparatus of the character referred to for propor tioning a chemicahcontaining liquid with respect to water assed through a heater and constituting the eed water for a steam boiler or' the like.

`My invention resides in a system or apparatus lof thecharacter referred to wherein the one liquid, as a chemical-containing liquid, is delivered through a conduit, the elevation of Whose intake within said liquid `is varied with accuracy and. nicety equally' 30Al or proportionately to variation of depth of a liquid which is pro ortional to the quantity or rate of flow o a liquid with respect to which 'the first named liquid` is to be proportioned. j i i My inventionl resides also'in a system and apparatus4 of the character referred to wherein the rate of delivery of one liquid, as a chemical-containing liquid, is promptly and with nice-ty varied in proportion to a second liquid, notwithstanding sudden variations in the quantity or rate of flow of said second liquid.'

My invention resides'in apparatus of the character hereinafter described and claimed. For an illustration of one of the Various forms my invention may take, reference is to be had to the accompanying drawing, in which: Figure 1 is a in section, of apparatus involving my'mvenside elevational view, partly tionjas' applied to feed water heating and purifying apparatus.

Fig. 21s a ragmentaryiview in section, on enlarged scale, of part of the structure shown in Fig. l.

Fig. 3v is an elevational view of a notch" as employed in thestructure of Fig. 2.

Fig. 4.# is an elevational view of a notch as employed in another part of the' apparatus of Fig. 1.

Referring to the drawing, 1v is a pipe through which there is delivered under pressureone of the liquids, as water, to be employed as the feed water for a steam boiler or for `any other purpose. .ln the there isfin'terposed between the anges 2, 2 a plate Shavingi an orifice of suitable area determining thequan'tity of water passing therethrough to the 'heater Hof any suitable type, here illustratedy as one'provided withv the'trays4 to which the water is delivered from pip'e 1. The' water while upon theV trays and ir'iowing from one to the other` in succession comes into direct contact with' steam, as'exhaust steam supplied through the pipe to separator 6' from which it is discharged to the interior of the heater H. Aswell understood in the'art, the water is pipe 1v 'patentes nai. e, 1ere..

raised in temperatureby its VContact, with 7 the steam and falls into th'e treating tank'l,

`within which is disposed the conical cham ber 7 discharging at itsupper end into the pipe 8 extending to the exterior of the tank T at 9 and'communicating with the boiler feed pump, or delivering to any @ther suit# able receptacle or device. Upon the water within the'tank T rests a' Heat 10, which through any suitable connecting means controls the valve 11 inthe pipe 1. Ait any suitable oint between the valve l1' and the ori'ce p ate 3 is connectedA a pipe 12, in which is4 disposed -a plate 13 Ahaving a smaller aperture or orice of suitable area, the plate 13 beingheld between the flanges 14; The pipe 12 delivers Water, o erating as a control liquid, intothe closed oat box or vessel l5 below the water level th`erein. v Withinthe box or vessel is disposed the oat' within the heater I-I. 4

The pipe 18 delivers the control water into the receptacle 20 having at its bottom the chamber 21 having the two outlets 22 and 23 of'equal areas, or having areas beartank cal-containing liquid, .which is to be propering any suitable proportion to each other.

`The receptacle 20 is supported upon tank T1,

within which is disposed the ioat 24 carrying on its upperv side a receptacle 25 having an orifice or notch 26 through which water delivered from outletv 23. into receptacle 25 overflows into the tank T1. the water in the receptacle 25 is a float 27 to which is attached a cord or chain 28 passing over the idler pulleys 29supported upon the tank T1 and connected at its other end to the bail or member 30 carrying the horizontal rod or bar 31 movable vertically upon the guides 32 carried byand extending into the T2 which contains the liquid, as chemitioned with respect to the water flowing .through pipe 1 into theheater H and tank '1. At suitable height above the bottom of the tank T1 is provided a draw-off pipe 33 controlled` by valve 34, whereby the water within the tank T1 may be drawn ott', preferably into the tank T2, In the bottom of the tank T1 is provided a draw-ofi1 controlled by valve 35 for completely emptying or cleaninthe tank T1.

he motor M, as an electric motor, is belted to the wheel 36 upon theshaft 37 journaled upon the top of the tank T2, the shaft 37 driving through suitable gearing the vertical shaft 38 to rotate the paddles or stirring means 39 within the tank T2, to cause mixture or solution of the chemical in the water contained in tank T2 and for keeping it constantly in agitation so that from a chemical standpoint it shall be of uniform strength or concentration.

`Within the liquid in the tank T2 is disposed the chemical discharging pipe orconduit 40, pivoted at 41 and discharging through the stationary pipe 42 into the funnel or receptacle 43. At its upper end the pipe 4 0 is secured to or communicates with a head 44 partially submerged in the liquid in tank T2 and within which is disposed the transverse diaphragm or partition 45 havinlg an orifice or notch 46, to one side of whic liquid in the tank T2 rises through the passage 47, overflowingV through the notch 46 into the passage 48, from which latter -it flows into pipe 40 and is discharged through pipe 42 into receptacle 43. The passages 47 and 48 are preferably open at' their upper a lever 51 having suitable Floating upon `tacle 43 through the By this structure liquid ripples or regular or undesired variation of head upon i the notch 46. l

' Upon the pipe 40 or the head 44 'is' a roller fl rolling upon the aforementioned bar 31. e ber 50 movable to any deslred position upon attachment tothe pipe 404 through a wall of the tank T2.

The discharge outlet 22 from cham-ber 21 delivers into the pipe 52, which may discharge into receptacle 43, which latter discharges throughV pipe 53 controlled by valve 54 into the suction or intake of the injector or ejector 55, to which motive fluid, as steam or hot or cold water, preferably having Ino content reacting with the chemical in tank T2, is delivered through pipe 5 6a controlled by valve 56.. The ejector 55 discharges both the motive fluid and the liquid from receppipe 57 controlled by valve 58 into the heater H or tank T into the water in the latter.

pipe 40 iscounterweighted by the mem- The chemical in the water/discharged l from pipe 57 into the tank-Treacts with coiltent of the water entering heater H from pipe l, and the precipitate formed sedimentizes and collects in the sludge cone59, from which it may be drawn off from time to time through the valve 60. The clarified and treated water passes upwardly through the cone 7 and through pipe -8 and is delivered to any desired device or receptacle, as for example, a boiler feed pump.

Some steam enters the box 15 from heater H through the pressure equalizing `pipe 19 and is condensed thereinV and added to the water discharged from the box 15 through the pipe 18. shall be a minimum, and so affect to a minimum the proportionality between the quantity of water flowing through the pipe 18 to the quantity flowing through the pipe, 1 into the heater H, it is desirable that as little cold'water as possible shall come into contact-'in box 15 with steam entering through 4the pipe 19. This is accomplished by hav- .pressures o n opposite sides of that plate.

The pressure to the right of the plate 3 is affected by the back pressure which may exist in the heater H. In order that the pressure on the right side of thc orice plate 13 shall be the same as that on the right side of orifice plate 3, the connection 19 between box In order that this condensation v will 15 and the heater H is provided. Thisin sures that both orifice plates are subjected to like pressures on their opposite sides and insures strict proportionality between the quantities of water flowing through them.

The operation is as follows:

. As water is drawn oif through thev pipe S, water is admitted through pipe 1 into the heater H through the valve 11 controlled by iioat whose position is dependent upon the quantity of water in the tank T or the rate of discharge of water through pipe S.

The pressure or head of the water in the `pipe 1 is the same upon both apertured plates 3 and 13, and in consequence the quantity of water passing through ori-iced plate 13 is any suitable or desired proportion of the plantity of the water passing throu h the orifice in the plate 3 to theheater and tank T, the proportion de ending upon` the relative areas of theori ces in' plates 13 and 3.

There accordingly flows into the loatbox 15 water whose quantity is a predetermined proportion of that flowing into the heater H and tank T. And the water flowing from box 15 through pipe 18 into receptacle 20 and chamber 21.bears a like proportion to that flowing into the heater and treating tank. A definite proportion of the Water received in chamber 21 iows into the receptacle 25 .upon float 24, this' quantity of water again bein a definite proportion of the water flowing into the treating tank T through apertured plate 3.

1f the rate of consumption of water from pipe ,8 remains substantially constant, `the rate of dow of water through apertured plate 3 into the tank T remains substantially constant, and there is a substantially constant head of water in receptacle 25 upon notch 26, the water overdowing through the notch 26 intothe tank T1, in which the depth of water incre-ases at a practically constant rate, it being remembered that valves 34 and 35 are normally closed. As a result, therefore, the ioat 27 remains at a substantially constant height with respect to the rising level .of the water in tank T1 on which rests the float 24, and since the latter rises at substantially constant rate, the bar 31 descends at substantially constant rate, Vwith.v

the result that there is substantially constant head upon the notch 46 in the partition or diaphragm 45 in the head 44 result-ing in a substantially constant discharge of chemical bearing liquid into the receptacle 43, with substantially constant rate of discharge ofchemical bearin liquid by ejector 55 into the water tank As a result, the chemical of a given strength or concentration 1s delivered at substantially const-ant rate into the tank T and therefore in direct proportion to the amount of water flowing into and drawn off from the tank T.

The notches 26 and 46 are of similar shape,I

in this case rectangular, and of. equal heights. But their widths are so proportioned that the quantities of water flowing through them at any given head, bear the same proportion ,to each other as the volumes of water per unit of depth in tanks T1 and T2. Tn other words, both tanks'T1 and T2 being cylindrical, for example, b`ut being of different diameters, for each unitof depth ot' water intank T1 there ,is an amount of water which bears the' same relation to the amount otwater' in tank T? for each unit of depth that the horizontal .cross sectional area of the.

tank T1 bears to the horizontal cross sec` tional area of the tank T2. This proportion is the same as the proportion between the widths otnotches 26 and 46, whereby tor each unit volume of water overflowing through notch- 26 into tank T-1 there is the same increase in depth of water in tank T1 as there is decrease in depth of liquid in tank T2 because of overiow of liquid through4 notch 46 into pipe 40.

ln case there should be a sudden fluctua-V tion or change in the rate of flow of water through apertured plate 3 into the heater Til and tank T, there will be a similarly sudden` or proportional variation of flow of water through the apertured plate 13 into the float box 1'5 and chamber 21, with the result that there will be a sudden fluctuation in the depth of the water in the receptacle 2-5 which will cause a corresponding sudden change in vheight of float 27, before a corresponding eiTect is produced in the depth of the water into the tank T occurs promptly in'response to change in level in tank T, but nevertheless the same proportion between the amountof water delivered into the tank T from pipe 1 and the liquid' delivered through pipe 57 remains the same.

Accordingly the compound float structure in tank T1 insures that the rate of flow of li uid through pipe 40 maintains a constant relation with respect to the rate of flow of water through pipe 18, and therefore to the rate of flow of water through pipe 1 into the heater H and tanklT, both when the rate oflow of water from pipe 1 into tank T is constant and when it varies either slowly or.

suddenly.

Notwithstanding the arcuate movement of the head 44 upon pipe 40, the vertical component of its movement is in virtue of the rodi 31 and roller 49 always equal or proportional to the vertical movement 'of the float 4 27, whereby direct proportionality between the How of liquidA through pipe 40 andthe 4 in the tank T1. 1n consequence of this quick How of Water through pipe 1 into tank' T is accurately maintained.

In case steam is admitted through valve 56 as the motive fluid for the ejector 55, the admixture of the condensed steam vvith the Water in the tank T does not disturb the proportionality between the chemical introduced into tankv T and the amount of raw water requiring treatment Vintroduced into that, tank, inasmuch as the Water resulting from condensation of the steam used as motive fluid in the ejector is practically distilled Water and has no content with which 'the chemical reacts.

And in case the motive fluid is water, either cold or hot, which has been previously purified or chemically treated, or which has no content reacting with chemical of the vcharacter delivered from tank T2, the

amount of chemical introduced into the tank T remains in proper proportion for the content of the raw water introduced intov tankT with Which the chemical is to react. When hot Water is used as the motive fluid for the ejector 55, it may be taken from any suitable source as the boiler, and in the-latter case isobviously such as has previously been chemically treated.

The" Water delivered from outlet 22 through pipe 52 into receptacle 43 is raw water' which dilutes the chemical liquid delivered into receptacle 43 from tank T2;

' the chemical beii but this dilution Water, being a definite prov portion of the water flowing into the tank 85S' T lfrom pipe 1,'does not disturb the proportionality of the chemical'with respect to the water in tank T, the amount or strength of determined with respect tank T through to the water intr uced -into vpipe 1 and also that delivered indirectly thereto through pipe 52.

When hot Water is 'used as motive fluid for the ejector 55, some of it may be delivered as dilution Water to receptacle-43 through pipe 61 controlled by valve 62.

It will be understood that all the Water delivered through pipe 18 into receptacle 20 ma be delivered into receptacle25 and the ou et 22 and pipe 52 omitted, in which case pipe 18 may discharge directly into recepltacle 25, and receptacle 20 and 4chamber 21 may be omitted.

The outlet 22-and pipe 52 may be omitted in case the motive Huid for the ejector 55 is hot Water requiring no 4chemical'treatment; and in'such case thehot water mo- `treatment of the water in tank T is eected while hot. The exhaust steam delivered when it -is live steam, the heat remainingv therein after performance of the Work of delivering liquid through pipe 57 into the tank T is given up to the Water in tank T and so conserved, With- .the resultV that even live steam may be employed as motive fluid for the ejector 55 at practically little cost, as measured in heatl units lost. v The steam for ejector 55 may be the medium for heating the Water delivered to the heater H from pipe l, in which case pipe 57 may discharge above the trays 4 and steam pipe 5 may be omitted, or employed to sup ly any additional heat over and above t at supplied by the fluid from the ejector.

The use of an ejector in the relation described is of further advantage, particularly when the chemical in tank T2 is milk of lime, which latter has been found to dsar-` A respect to the surface of said one fluid in said receptacle, and means for varying the heightof said intake comprising a second r'eceptacle, a float therein, a third receptacle carried by said float andreceiving said control fiuid, said control fluid overflowing from said third receptacle into said second receptacle, and a float in said third receptacle controlling said intake.

2. Apparatus for proportioning one fluid With respect to another comprising means producing a flow of control fluid proportional to said other fluid, a receptacle for said one fluid, a discharge conduit for delivering said one fluid from said receptacle, said conduit having an 'intake movable With respect to the surface of said one fluid in said receptacle, and means for varying the height of saidintake comprising a second receptacle, a float therein, a third receptacle carried by said float and `receiving said control' Huid, said control fluid overflowing from said third receptacle into said second receptacle, and a float in said third receptacle controlling said intake,'said third receptacle and said intake having passages so proportioned with respect to each other that thequantities of fluid passing through them ascenso bear the same proportion to each other as the volumes of duid per lunit of depth -in r 5. Apparatus for controlling Huid delivl ery comprising a receptacle, a float therein,w

gli

said iirst and second receptacles. l

3. Apparatus for proportioning one fluid with respect to another comprising means determining the dow of said one fluid, and means controlling said means comprising a receptacle, a oat therein, a second receptacle carried by said float, means for deliverl ing into said second receptacle fluid proportional to said other fluid, said fluid overflowing from said secondreceptacle into said first named receptacle, and a float in said second receptacle controlling lsaid first a second receptacle carried by said float, means delivering Huid into"said second receptacle overflowing into said first named receptacle, a oat in said second receptacle, and means controlling fluid delivery controlled by said second float.

6. Apparatus for controlling Huid delivery comprising a receptacle containing' `the duid, means for discharging fluid from said receptacle comprising a fluid intake movable in an arcuate path with respect to the level of fluid in said receptacle,- a horizontal 'member along which said intake is movable,

and means varying the height of said horiaontal member.

7. Apparatus for controlling Huid deliveryA comprising a receptacle containing the fluid, means for discharging fluid from said bil receptacle comprising a Huid intake movable 1n anarcuate path Withrespect tothe level of Huid in said receptacle, a horizontal member, a roller movable along saidy membei-"and supporting said intake, and means for varying the height-of said horizontal member.

8. Apparatus for proporti'oning one Huid with respect to another comprising a receptacle, a Hoat therein, means for delivering to said receptacle fluid proportional to said other Huid, a second receptacle containing said one duid, a conduit for discharging duid from said second receptacle, an intake for said conduit movableV with respect to the level of Huid in said second receptacle, a

horizontal member controlled as to vertical movement by said lloat, and means supporting said intake upon the horizontal member and allowing thereof.

-9.- Apparatus for proportioning one fluid movement longitudinally with respect to another comprising a recep,

tacle, a` floatv therein, means for delivering to said receptacle fluid proportional to said other fluid, a second receptacle containing said one fluid, a conduit for discharging said one fluid from said second receptacle, and an intake head for said conduit controlled. by said float and comprising a chamber open at its lower end for receiving fluid from said second receptacle, a second chamber com- .municatirng,with said conduit, and a partition between. said chambers having a passage forming communication between said chambers. n

10. Apparatus for proportioning one fluid 'With respect to another comprising a receptacle, a float therein, means for delivering lto said receptacle fluid proportional to said other fluid, a second receptacle containing said one fluid, a conduit for discharging said one fluid from said second receptacle, and an intake head for said conduit controlled by said float and comprising a chamber open at its lower end. for receiving fluid from said second receptacle, a secondchamber communicating ywith said conduit, and a par- .tition vbetvveen said chambers having a notch through which liquid entering said first named chamber flows into said second chairnber.`

ll. Apparatus for proportioning one Huid with respect to another comprising means for delivering said one fluid, and means for controlling said means comprising a float box, means for deliveringA thereto duid proportional to said other fluid, a Hoet in said bon controlling discharge of said fluid therefrom, a receptacle receiving the fluid discharged from said box, and a float in saidl receptacle controlling said first named means.

12. The combination with a Water heater comprising-a closed chamber, of means for delivering Water thereto, a float box, means connecting said float box with said chamber,

-means for delivering into said box Water proportional to the Water delivered to said heater, a float in said box controlling discharge of Water therefrom, and means controlled 'bythe Water dischargedfrom said boX controlling'delivery'of a liquid proportional to' the Water entering said heater.

ldd

Mib

13. 'llhe combination with a Water heater y comprising a closed chamber, of means .for

v delivering Water into 'said heater chamber, afloat box, means for delivering Water into s said boir ysubstantially below the water level therein, a float in said box controlling disl,charge of Water therefrom, a connection ilili lfrom saidheater chamber'tosaid float box above the water level therein, andmeans controlled by the water discharged :from saidbox controlling delivery of a liquid proportional to the water entering said'heater.A

14. Apparatus for proportioning one Huid with respect to another comprising means controlling delivery of said one Huid, a closed chamber, an orifice plate through which said other Huid is delivered into said chamber, a iioat'box, an orifice plate whose high pressure 'side Acommunicates with the high pressure side of said 'first named plate,

andwhose'low pressure side communicates with saidifioat box, whereby a predetermined proportion of A said other Huid is delivered into said fioatbox, a pressure-equalizin oonnecti'on'between said chamber and sai lioat box, a float iny said box controlling discharge of fluidther'efrom, and' means `controlled by the""uid 'discharged from saidl box controllin said first namedv means.

15. pp'aratusifor' plroportioning one fluid with respect to anot 'er com-prism means controlling delivery of said one'luld, members having orilices throu h which said other fluid is delivered, said orifices being so pro-v portion'ed 4with4 respectto each other that the flow thrcughone'bears a predetermined relation'to the llow through theother, a float box receiving the "Huid delivered l through one of said orifices, ailoat 'in said box 'controlllng discharge of said fluid' therei from, and means controlled' bythe fluid discharged rom said box controlling 'saidlirst named means. l

lo. v'llhe combination -with a water heater comprising a closed chamber, meansfor de- 'liveringheating fluid into said chamber a lmember having "an orifice through which' water is'delivered to said heater, a second member having an orifice through which flows water proportional to the water dellvered to said heater, y a 'float box receiving the "water delivered through said second oriiice, a connection from said float box with said heater chamber, a' oat in'said box con- 'trolling discharge of water therefrom, l'means controlling the iiow oa liquid, and fmeans controlling said last named means controlled by said Hoat box.

the water 'discharged from -17. y'Apparatus for plrop'ortioning one fluid with respectA to 'anot er comprising means dischargmg'said lone duid, means' producing 4a ilow'of control iinid 'proportional to -sai other Huid, means controlled lby a redeter- 'f minedfraetion 'of said control flui' control- -lingsaid` first named means, and means for admixmg with `said one duid discharged' by lsaid rst --name'd means another -predeter- --mined fraction ofsaid vcontrol 'Hu-i l 18.5The combination with--a'closedfchamberg-of- 'meansgfor delivering liquid thereto,

a vessel, means for delivering into said vessel liquid proportional to the'liquid deliveredto said chamber, a pressure equalizing connection between said chamber and said vessel, means controlling discharge of liquid from said vessel, and means controlled by the vliquid dischar ed from said vessel controlling delivery o liquid proportional to the liquid delivered into said chamber.

19. The combination with a closed chamber, of means for delivering liquid thereto, a vessel, means for delivering into said vessel below the'liquid level therein liquid proportional to the .liquid vdelivered to said chamber, a pressure equalizing connection between said chamber and said vessel, means controlling discharge of liquid from said vessel, and means controlled by the liquid vessel controlling delivery of liquid propor- 'tional to thef liquid deliveredintol sai chamber.

'21. Thev` combination with a closed ehamber, of means for delivering liquid thereto, 'a vessel, means 'for delivering into said vesselfbelow the liquid level therein liquid proportional to the vliquid delivered to "said chambena pressure equalizing connection fbetween 'said chamber and said vessel, means."

" responsive to 'change in quantity of liquid in said vessel controlling discharge of liquid 4 "tl1erefrom,andmeans controlled by theliquid discharged from said vessel 'controlling delivery of liquid roportional to the liqui ldelivered intov said) chamber. In fluid proportioning apparatus, the combination wltlral chamber, o

means for dividing liquid into streams bearing a predetermined proportion to each other, means for conducting one of-said streams intosaid chamber, a vessel. receivin Vanother of'said streams, a'V ressur'eequa izing connection between sai vessel and said chamber, Ameans comtrollin' discharge vof liquid Afrom said qlfiantlt7 of' liquid in said chamber controle ivery of liquid to saidz-iirstmamed means.

2"?23. The 1 combination; with aj 'water heater 2 comprisingga chamber, of means for delivwaterthereto, a vessel, 'means fordelivermgnintosaid vessel water proportional- :tothe 'water'deliveredl tosaidhe'ater, aw 'ressure equalizing connection between sai vesi -vessel, -an' fmeansresponsivefto-change in meente sel and said chamber, means controlling dis.

charge of Water from said vessel, and means controlled'hy the Water discharged rorn said vessel controlling delivery into the Water delivered to said heater of chemical hearing liquid proportional to the water en-v tering said heater. 1

24. The combination with a Water heater comprising a chamber, of means for deliv- .of chemical bearing ering Water thereto, a vessel, means 'for delivering into said vessel Water proportional to the water delivered to said heater, a pressure-equalizing connection between said vessel and s`a1d chamber, means .responsive to changes in quantity of water in said vessel controlling dischar e of water therefrom, and means control ed `by the IWater discharged rom said vessel controlli delivery into the waterl delivered to sai heater the water entering sai here id proportional to .25.Y `The combination with a vvater heaterl and a treating tank receiving water therefrom', of means for deliverin water to said heatena vessel, means for de lvering to said tional to the water discharged from said vessel, and means responsive to the quantity of Water in said tank .controlling delivery of' AWater to said heater and saidvessel;

In testimony whereof l have herenntoaithxed my signature this 8 day oi March,

me, v Ravi/ione D. 'n reni". 

